ADAMS : DIPTEROLOGICAL CONTRIBUTIONS. 45 



rufous, black just above the coxae, with a narrow, silvery dusted 

 line near wing ; scutellum rufous ; metanotum almost entirely 

 black, silvery and pollinose above, which extends upon the 

 sides ; halteres yellow ; abdomen red, more or less black on 

 dorsum of first, third, fourth and fifth segments, posterior 

 borders of first five segments and the sixth almost wholly cov- 

 ered with yellow pollen; legs reddish, tibiae with silvery 

 reflections exteriorly, front and middle tarsi dark brown, 

 posterior ones lighter ; wings with costal, subcostal, marginal, 

 submarginal cells, and basal half and anterior part of distal 

 half of first posterior cell brown, which also encroaches upon 

 the proximal portion of basal cells, remainder of wing hyaline. 

 Length of body, 12.5 mm. ; wing, 9 mm. 



Three specimens; Salisbury, South Africa. Frank L. Snow. 



DIOPSID^. 



Diopsis affinis, n. sp. 



Head light red, ocellar tubercle and an arcuate line on front 

 black, spinate on each side of oral margin ; eyestalks red, 

 black at apex, median bristle small, black, apical spine strong, 

 black; antennae testaceous, arista brown, subdorsal; eyes 

 black, large ; thorax black, dorsum shining, humeri, anterior, 

 lateral and posterior margins grayish pollinose ; pleurae black, 

 grayish pollinose ; scutellum shining black, pollinose on mar- 

 gin ; sj)ines shining testaceous, black at tip ; halteres yellowish 

 white; abdomen shining testaceous, venter obscure yellowish, 

 pile sparse ; legs pale testaceous ; anterior coxae light gray 

 pollinose, front femora thickened, front tibiae and tarsi brown, 

 four hind femora armed with spines at distal end ; wings hya- 

 line, tinged with brown, veins dark brown. Length, body, 7 

 mm. ; wing, 6 mm. ; eyestalk, 2.5 mm. 



One specimen ; Salisbury, South Africa. Frank L. Snow. 



Diopsis pollinosus, n. sp. 



Head obscure testaceous, two obscure cross-bands on front, 

 lateral spines of oral margin small ; eyestalks reddish brown, 

 expanded ends black; antennae red, arista brown, subdorsal; 

 thorax and scutellum black, wholly gray pollinose ; spines of 

 scutellum brown, yellowish at tip ; halteres pale yellow ; abdo- 

 men black, first segment gray pollinose, second and third seg- 

 ments shining, with lateral gray pollinose spots, remaining seg- 



